This information is from Roger Moore's old web site.
1950s G-1 Jackets
As noted above the first G-1 spec was the 55J14 which was manufactured from 1947 to 1961. These jackets very collectible and only slightly less desireable than the earlier M-422A jackets. The 55J14 typically have shorter bodies than the M-422A and many have a snugger fit for their stated size. All of these jackets retain the painted "USN" stencil under the mouton collar....
G-1 Information
1950s G-1 Jackets
As noted above the first G-1 spec was the 55J14 which was manufactured from 1947 to 1961. These jackets very collectible and only slightly less desireable than the earlier M-422A jackets. The 55J14 typically have shorter bodies than the M-422A and many have a snugger fit for their stated size. All of these jackets retain the painted "USN" stencil under the mouton collar....
G-1 Information